Returning mechanism and slide rail assembly using same

A returning mechanism, comprising:

• a first slide-assisting block comprising a first engagement feature;
• a second slide-assisting block comprising a second engagement feature and a second elastic structure, said second engagement feature having a first end and an opposing second end, said second elastic structure being located on one side of said second end of said second engagement feature.;
• and
• a synchronous member located between said first engagement feature and said second engagement feature, so that when said synchronous member is displaced between said second end of said second engagement feature and the stroke of said second engagement feature, said synchronous member continues to abut against said second elastic structure until said synchronous member is displaced to said first end of said first engagement feature to complete the return.

A slide rail assembly, comprising:

• a rail slide comprising a first rail, a second rail and a third rail, said second rail being movable relative to said first rail, said third rail being installed between said first rail and said second rail;
• and
• a returning mechanism comprising a first slide-assisting block, a second slide-assisting block and a synchronous member, said first slide-assisting block being movably arranged between said first rail and said third rail to assist said third rail to move relative to said first rail, said first slide-assisting block comprising a first engagement feature and a first elastic structure, said first engagement feature having a first end and an opposing second end, said first elastic structure being located on one side of said first end of said first engagement feature, said second slide-assisting block being movably arranged between said third rail and said second rail to assist the second rail to move relative to the third rail, said second slide-assisting block comprising a second engagement feature, said synchronous member being located between said first engagement feature and said second engagement feature, so that when said synchronous member is displaced between said first end of said first engagement feature and the stroke of said second engagement feature, said synchronous member continues to abut against said first elastic structure until said synchronous member is displaced to said second end of said second engagement feature to complete the return, or when said synchronous member is displaced between said second end of said second engagement feature and the stroke of said second engagement feature, said synchronous member continues to abut against said second elastic structure until said synchronous member is displaced to said first end of said first engagement feature to complete the return.